Wiktionary
amphiscian
a. that lives in the tropics (and thus casts shadows northward and southward at different times of the year) n. one who lives in the tropics (and thus casts shadows northward and southward at different times of the year)
Wikipedia
Amphiscian
Amphiscians, or Amphiscii, is a name given to inhabitants of the tropics.
The word comes from the Greek αμφι ("about"), and σχια ("shadow").
The Amphiscians were also called Ascii. This term related specifically to those inhabitants of the globe, which, at certain times of the year, have no shadow. The word is formed of the privative particle α, and σχια, (umbra, "shadow").